Wrench



Nov. 13, 1928. 1,691,326

c. F. ASH, JR

WRENCH Filed July 18, 1927 INVENTOR. m/mw FASH, J6

BY (2) W A TTORNEY.

Patented Nov. 13, 1928.

, UNITED I STATES [RA E NT OF FICEg,

WRENCH.

Application filed .rul 18,

My invention-relates to pipewrenches. An important object of theinvention is to provide a pipe wrench ot the adjustable jaw type, havingmeans whereby it will function'like a chain wrench. 1

A further object of the invention is to provide a wrench of theabovfementioned character which is strong, durable and reliable in operation.1 g

Other objects and advantages of the invention will beappar'entduring,the course of the following description. i

In the accompanying drawings, forming a part'of this specification,andinwhich like numerals are employedto designate like parts throughoutthe same,

Figure 1 is a side elevati embodying my invention, 1 Figure 2 is a planview of thesame, Figure 8 is a horizontal section taken on line 33 ofFigure =1',-.

Figure 4 is an enlarged vertical longitudinal section through thewrench, taken on line 4+4; of Figure 2, 5

Figure 5 is a transverse section takenon line 55 of Figure. 1, A

Figure 6 is aperspective view of jaw element, p v 4 Figure 7 isadetailed section through the links included in the lowerj aw element,

Figure 8 is a plan view of the links included in the upper jaw element:1 I

f the links Figure 9 is a bottom plan view 0 included in the lower jawelement. p

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 15 desig nates ashank, polygonal in cross section having a stationary jaw head 17rigidly secured thereto. This jaw head is channel shaped in crosssection, providing a chamber'18, having a curved bottom wall 19.

The numeral 20 designates an adjustable jaw head, integral with a sleeve21, slidable upon the shank 15. The shank has a screwthreaded portion22, engaged by a nut 23,

on of a wrench the lower operating through opening 24 in the sleeve 21.

The adjustable jaw is moved longitudinally upon the shank by turning thenut23,as is obvious.

The numerals 25-and 26 designate chain jaw elements. Each of thesechains embody a plurality of links 27, having interfitting knuckles 28and 29, pivotally connected by pins 30. The links 27 in the chain 25have inwardly projecting ratchet teeth 31, which 1927. 1 Serial1197206502.

face toward the shank 15, whilethe links 27 in thecliain 26-have ratchetteeth 32, facing away "from the shank 15. The links 27 in each chain25an'd 26 have extensions 33, to engage.

within notches orrecesses34, formedin the adjacent link. The function ofthese BXtIl-Z;

sions and-recesses isto. limit the inward movement ofthe lin'ksof thechains, beyond a straight line position. a

The outermost l'ink 27 ofth e chain2 5 has its knuckle, at the outer endthereof, ar-

rangedbetween apair of links35.and pivoted thereto'at'36; The links35extend intothe jawhead 17 and are pivoted therein by. a

transverse pinf37. The innermost link-27 of the' chain 25-is pivoted tothe inner portion of the jaw head 17 by a pin 38 The stitl' spring39.has one end thereof rig dly. attached to the innermost link of thechain25. and its opposite end enga es the bottom wall'19 ofthe iaw head 27.This sprin 39 constitutes r silient means-to move the chain 25 inwardlyfrom the stationary jaw.

I "The adjustable jaw head 20 receives "a lOTlQT'tHdlHflllV .curvedcarrier 40. which its channel shaoed in cross section and has a attachedto the end of this link and eng ges the bottom wall 41 of the carrier.This spring 46 constitutes resilient means to move the chain 26 inwardlyfrom the movable Jaw. p The operation of the wrench is as follows:The-jaws are applied to the work. so that i the chains 25 and 26 eng getherewith. The nut 24is adjusted to bring the chains in clamping engaement with the work. The chains 25 and 26 flex inwardly, the chain 25havingits links brought into en agement with or adjacent to the bottomwall 19. while the chain 26 has its links engaging with or broughtadjacent to-the bottom wall 41 of the carrier 40. These chains flex byvirtue oftheir pivotal connection with the swingports and therefore have"clamping engagement with the pipe. lVhen'the wrench is turned in areverse direction the chains free to be taken as a preferred exampleof'the same, and that various changes in the shape, size and arangementof parts may be resorted to without departing from the splri-tof myinvention, or the scope ofthesubjoined claims. Y i

Having" thus described my invention, I

claim: I 7

'1. In a wrench otthe character described,

carried thereby, a movabl'ejaw head mounted upon the shank, a chainelement arranged adjacent to the stationary jaw head and having itsinner end pivotally connected there- 'with, links pivotall y connectingthe outer with, and links pivotally connectingthe outer and of: thesecond named'chain element with the movable jawhead. 1 F V 2; In awrench of the character described, a shank, a relatively stationary jawhead carried. thereby, a. movable: jaw head mount ed'upon: the shank, achain element arranged inwardly of and adjacent to the stationary jawhead and adapted'to engagetherewith upon being"flexed','mearrs pivotallyconnecting the inner end of the chainel'ement with the stationaryjawhead, a'link construction pivotally connecting the outer end of the linkelement with the stationary jaw head, resilient means to move thechainfelement inwardlyfromthe' jaw head, a secondchain element arrangedinwardly of and adjacent to the movable jaw head and adapted to en gagetherewith upon being flexed outwardly and having its inner end pivotallyconnected with the movable, jaw head, a link construction pivotallyconnecting the outer end of the second chain element and the movable jawhead, and resilient meansto' move the second named link element-inwardlyfrom the movable jaw element. r

described,

3'. Ina wrench of the character a shank, a relatively stationary jawhead carried thereby, 'a movable jaw head mounted upon the s1 inwardlyof and'adjacent to the stationary ank, a chain element'arranged V jawhead and adapted to. engage therewith W upon being flexed outwardly,said chain elea shank, a relatively stationary jaw head ment, meanspivotally connecting the innermost link of the Mchainel'em'ent withthesta- I tionary jaw head, a spring attached: to the innermost link andengaging the jaw head and adapted to'turn the same upon ltS plvot,

link construction pivotally connecting the outermost link of thech'ain'element and stationary jaw head, and working engaging meanscarried by themovable jaw head,

4:. In a wrench ofthe character described,

, a shank, a relatively stationary jaw head carand having its endsattached to the stationary jaw head, and a separate-flexible chain."

element extending longitudinally of the movable jaw'head' and having its.ends at-- 7 CHARLES F. ASH, JR. 1

